CVE-2025-69203HIGH 6.3EPSS p20.9%

CVE-2025-69203CVE-2025-69203

signalk / signal_k_server

Description

Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.19.0 of the access request system have two related features that when combined by themselves and with an information disclosure vulnerability enable convincing social engineering attacks against administrators. When a device creates an access request, it specifies three fields: `clientId`, `description`, and `permissions`. The SignalK admin UI displays the `description` field prominently to the administrator when showing pending requests, but the actual `permissions` field (which determines the access level granted) is less visible or displayed separately. This allows an attacker to request `admin` permissions while providing a description that suggests readonly access. The access request handler trusts the `X-Forwarded-For` HTTP header without validation to determine the client's IP address. This header is intended to preserve the original client IP when requests pass through reverse prox

Scoring

CVSS 3.16.3 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
EPSS0.30% probability of exploitation · percentile 20.9% · 2026-10-05T12:00:23Z
Published2026-01-01
Last modified2026-10-01

Underlying weaknesses· 1

CWE-290

References

  1. https://github.com/SignalK/signalk-server/releases/tag/v2.19.0
  2. https://github.com/SignalK/signalk-server/security/advisories/GHSA-vfrf-vcj7-wvr8

1

TypeTargetConfidenceTier
WeaknessAuthentication Bypass by Spoofingcwe-2900%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.